YAML to XML — Convert YAML Configuration to XML Markup in Your Browser

YAML is the format humans write and XML is the format enterprise systems expect, and the gap between them is the reason this tool exists. A DevOps team defines infrastructure in YAML (Kubernetes manifests, Ansible playbooks, Terraform variables) because YAML is compact and readable. A legacy monitoring system consumes that same data as XML because the monitoring system was built in the era when XML was the universal interchange format. The conversion from YAML to XML bridges that gap: it takes a YAML structure that was written for human readability and produces an XML document that any XML-aware system can consume.

The conversion uses JSON as an intermediary — YAML resolves to JSON, and JSON serialises to XML — so the attribute convention is the same as the one in the JSON-to-XML tool. YAML keys starting with @ become XML attributes, and regular keys become child elements. This convention is not part of any standard, but it is the de facto approach across the npm and Python ecosystems, and it is the right default for portability. YAML sequences become repeated XML elements, which is the only natural mapping: a YAML list of items has no equivalent in XML’s tree model except a repeating element with the same tag name at the same depth.

For a final hand-off: if the XML output is going into a SOAP service or an XML-RPC endpoint, confirm the expected root element name before converting — SOAP envelopes require a specific wrapper structure that the tool’s generic root element may not match. If the XML needs to conform to a schema, use the JSON Schema Generator (from the intermediate JSON representation) to produce a JSON Schema, then map the constraints to XSD by hand. If the output needs to include CDATA sections for embedded markup, add the <![CDATA[...]]> wrapping after conversion — the tool emits plain text content and does not detect when a value contains XML or HTML that needs CDATA encapsulation.